Lichamp Jumbo 2-3/8" Unibit Step Drill Bit for Metal, Extra Large Drill Stepper Bit for Hard Metal Heavy Duty, 12 Sizes from 1/4" to 2-3/8", Spiral Grooved, C5BK

ONE BIT FOR ALL DRILLING: One bit can drill 1/4 inch, 3/8 inch, 19/32 inch, 3/4 inch, 1 inch, 1-3/16 inch, 1-3/8 inch, 1-5/8 inch, 1-3/4 inch, 2 inch, 2-3/16 inch, 2-3/8 inch 12 different diameters of holes, saves time and effort in replacing the bit

DURABLE AND STRONG: Durable high speed steel with black coating ensures durability and sharpness, reduces friction, runs cooler, resists heat, corrosion and rust, and extends the life of the cutting edge even in extreme temperatures

EXTRA LARGE STEPS DRILL: Shank diameter is 13 mm (1/2 inch), use one step drill to drill different sizes of holes, much more convenient than using multiple drills, ideal for DIY projects in home, garden, workshop

HIGH PERFORMANCE: Split tip is at 118 degrees for better wear resistance. Double helix blade design makes smoother cuts, easier to dislodge material particles and cleaner drilling operations, can be used with electric drills, rechargeable drills and more

WELL DESIGNED: Provides stability during the drilling process, minimizes noise and vibration. To improve performance and extend drill bit life when working with metal, we recommend using cutting fluid for lubrication.(Cutting fluid not included)

Hole Diameter: 1/4", 3/8", 19/32", 3/4", 1", 1-3/16", 1-3/8", 1-5/8", 1-3/4", 2", 2-3/16", 2-3/8"